CMF / CRF Details
CMF ID: 8860
Install Red-light indicator lights
Description:
Red-light indicator lights are mounted on the signal head or on the mast arm. The indicator activates simultaneously with the red interval, allowing an enforcement officer downstream to identify if a vehicle has violated the red interval.
Prior Condition: 4-legged signalized intersection without RLIL
Category: Advanced technology and ITS
| Crash Modification Factor (CMF) |
|---|
| Value: | 0.882 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.074 |
| Crash Reduction Factor (CRF) |
|---|
| Value: | 11.8 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Applicability |
|---|
| Crash Type: | Angle |
| Crash Severity: | All |
| Roadway Types: | Not specified |
| Street Type: | |
| Minimum Number of Lanes: | |
| Maximum Number of Lanes: | |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Not specified |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | All |
| If countermeasure is intersection-based |
| Intersection Type: | Roadway/roadway (not interchange related) |
| Intersection Geometry: | 4-leg |
| Traffic Control: | Signalized |
| Major Road Traffic Volume: | Minimum of 5900 to Maximum of 80500 Annual Average Daily Traffic (AADT) |
| Minor Road Traffic Volume: | Minimum of 845 to Maximum of 62666 Annual Average Daily Traffic (AADT) |
| Average Major Road Volume : | 35841 Annual Average Daily Traffic (AADT) |
| Average Minor Road Volume : | 13934 Annual Average Daily Traffic (AADT) |
| Development Details |
|---|
| Date Range of Data Used: | 2003 to 2012 |
| Municipality: | |
| State: | FL |
| Country: | USA |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Nov 17, 2017 |
| Comments: | Disaggregated CMF for less than 20% of total entering volume from minor approaches The number of crashes in the after period were not reported in this study, however, they have been recorded as 300 to give 10 points as a beneift of doubt for one or more of the following: (1) number of miles/sites in the reference/treatment group, (2) number of crashes in the references/treatment group, (3) reporting AADTs for the aggregate dataset but not for the disaggragate dataset used for CMF development. |
[View score details]